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Feshbach resonances in ultracold atomic and molecular collisions : threshold behaviour and suppression of poles in scattering lengths.

Hutson, Jeremy M. (2007) 'Feshbach resonances in ultracold atomic and molecular collisions : threshold behaviour and suppression of poles in scattering lengths.', New journal of physics., 9 . p. 152.

Abstract

In the absence of inelastic scattering, Feshbach resonances produce poles in scattering lengths and very large peaks in elastic cross-sections. However, inelastic scattering removes the poles. Whenever the resonant state is coupled comparably to the elastic and inelastic channels, the scattering length exhibits only a small oscillation and peaks in cross-sections are significantly suppressed. A resonant scattering length is defined to characterize the amplitude of the oscillation, and is shown to be small for many collisions of ultracold molecules. The results suggest that cross-sections for some ultracold collision processes will be much less sensitive to details of the potential than has been expected.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1088/1367-2630/9/5/152
Publisher statement:This article is available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA version 3.0) licence.
Date accepted:No date available
Date deposited:18 May 2017
Date of first online publication:24 May 2007
Date first made open access:No date available

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